51145267 has 4 divisors (see below), whose sum is σ = 51983776. Its totient is φ = 50306760.

The previous prime is 51145249. The next prime is 51145309. The reversal of 51145267 is 76254115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51145267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51145667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419163 + ... + 419284.

It is an arithmetic number, because the mean of its divisors is an integer number (12995944).

Almost surely, 2^51145267 is an apocalyptic number.

51145267 is a deficient number, since it is larger than the sum of its proper divisors (838509).

51145267 is an equidigital number, since it uses as much as digits as its factorization.

51145267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838508.

The product of its digits is 8400, while the sum is 31.

The square root of 51145267 is about 7151.5919206845. The cubic root of 51145267 is about 371.1947428028.

The spelling of 51145267 in words is "fifty-one million, one hundred forty-five thousand, two hundred sixty-seven".